Other Comprehensive Income (Loss) - Changes in Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,074,284	$ 1,033,046	$ 1,079,081	$ 1,011,287
Current period changes in other comprehensive (loss) income	(45,304)	(5,588)	(155,230)	20,770
Balance at end of year	1,029,645	1,030,876	1,029,645	1,030,876
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(155,845)	(43,267)	(45,919)	(69,625)
Current period changes in other comprehensive (loss) income	(45,304)	(5,588)	(155,230)	20,770
Balance at end of year	(201,149)	(48,855)	(201,149)	(48,855)
Unrealized (Losses) on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(93,701)	18,582	1,644	31,028
Current period changes in other comprehensive (loss) income	(47,168)	(8,154)	(142,513)	(20,600)
Balance at end of year	(140,869)	10,428	(140,869)	10,428
Unrealized (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(932)	(10,225)	(4,917)	(16,856)
Current period changes in other comprehensive (loss) income	1,182	1,467	5,167	8,098
Balance at end of year	250	(8,758)	250	(8,758)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(61,212)	(51,624)	(42,646)	(83,797)
Current period changes in other comprehensive (loss) income	682	1,099	(17,884)	33,272
Balance at end of year	$ (60,530)	$ (50,525)	$ (60,530)	$ (50,525)